Results 61 to 70 of about 19,606 (183)

Speciation of European bullheads (Cottus spp.): The next problem for taxonomy of northern freshwater fishes

open access: yesJournal of Fish Biology, Volume 109, Issue 1, Page 15-26, July 2026.
Abstract High morphological and ecological diversity displayed by European bullheads led Freyhof et al. (2005) to describe 15 nominal species. However, the basis for declaring these nominal species is contentious due to a lack of rigorous statistical analysis of morphological variations among populations, limitations in the inferences made from ...
David S. Murray   +3 more
wiley   +1 more source

Effects of thermal and elastic deformations on lubricating properties of the textured journal bearing

open access: yesAdvances in Mechanical Engineering, 2019
Hydrodynamic journal bearing is an important part of rotary machine and faces many challenges such as high rotating speed, heavy specific pressure, and large temperature rise with the development of industry.
Yu Zhang, Guoding Chen, Lin Wang
doaj   +1 more source

Nanozymes at the Bio‐Nano Interface: From Synthesis, Defect Engineering, Catalytic Behavior in Biological Microenvironments, and Biosafety Implications

open access: yesAdvanced Materials Interfaces, Volume 13, Issue 11, 9 June 2026.
Nanozymes (NZs) have emerged as versatile artificial enzymes with tunable catalytic properties driven by atomic coordination, defect engineering, and surface chemistry. This review presents a bio–nano interface framework linking synthesis strategies, structural design, and catalytic behavior within complex biological microenvironments.
Karen Guadalupe Quintero‐Garrido   +6 more
wiley   +1 more source

The Hydrodynamical Theory of Multiple-Film Journal Bearings

open access: yesTransactions of the Japan Society of Mechanical Engineers, 1956
Several kinds of journal bearings, which are designed to have a multiplicity of convergent oil films in the bearing instead of the conventional journal bearings whch have single oil film in the bearing, are used as precision high speed bearings with very little clearance.
SASAKI, Tokio, MORI, Haruo
openaire   +2 more sources

Viral Pathogens Threatening Cage‐Cultured Nile Tilapia in Lake Victoria: Epidemiology, Emerging Risks and Integrated Health Management Strategies

open access: yesAquaculture, Fish and Fisheries, Volume 6, Issue 3, June 2026.
ABSTRACT The rapid expansion of cage culture for Nile tilapia (Oreochromis niloticus) in Lake Victoria is central to food security and profitable development in East Africa. Nevertheless, viral conditions affect the sustainability of this sector, with significant imbalances in livelihood, trade and aquaculture adaptability.
Richard S. Komba, Chacha J. Mwita
wiley   +1 more source

An Experimental Investigation of Oil Film Temperatures in Elliptical Profile Journal Bearing

open access: yesTribology Online, 2013
Hydrodynamic journal bearings experience significant variation in oil film temperature. Reliable data of operating temperatures in these journal bearings are very useful and important for practical bearing designers and mathematical modellers.
Rakesh Sehgal   +2 more
doaj   +1 more source

Thermo-Elastohydrodynamic Study on Textured Journal Bearing with High-Speed and High-Specific-Pressure

open access: yesXibei Gongye Daxue Xuebao, 2019
The performance of supporting journal bearing of the star gear transmission system in the geared turbo fan engine (GTF) is analyzed. A thermal-elastohydrodynamic analysis model was developed for textured journal bearing used in high-speed and high ...

doaj   +1 more source

Experimental Measurement of Oil Film Temperatures of Elliptical Journal Bearing Profile Using Different Grade Oils

open access: yesTribology Online, 2010
A significant variation in oil film temperature has been observed in hydrodynamic journal bearings. Here, a journal bearing test rig has been developed to measure the oil film temperature on the three circumferential planes of the journal bearing ...
Rakesh Sehgal
doaj   +1 more source

Lubrication Characteristics of a Temperature-Viscosity-Controlled Hydrodynamic Journal Bearing: Prototype and Experiment

open access: yesTribology Online, 2016
This study experimentally investigated the possibility of controlling the static lubrication characteristics of hydrodynamic journal bearings by cooling and heating locally.
Toshiharu Kazama   +3 more
doaj   +1 more source

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